Refactored get_query_set_class() to DatabaseOperations.query_set_class(). Also added BaseDatabaseFeatures.uses_custom_queryset. Refs #5106

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5976 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 10 insertions, 0 deletions

diff --git a/django/db/backends/__init__.py b/django/db/backends/__init__.py
index 2415d453ce..0a86ed1476 100644
--- a/django/db/backends/__init__.py
+++ b/django/db/backends/__init__.py
@@ -48,6 +48,7 @@ class BaseDatabaseFeatures(object):
     supports_constraints = True
     supports_tablespaces = False
     uses_case_insensitive_names = False
+    uses_custom_queryset = False
 
 class BaseDatabaseOperations(object):
     """
@@ -144,6 +145,15 @@ class BaseDatabaseOperations(object):
         """
         return 'DEFAULT'
 
+    def query_set_class(self, DefaultQuerySet):
+        """
+        Given the default QuerySet class, returns a custom QuerySet class
+        to use for this backend. Returns None if a custom QuerySet isn't used.
+        See also BaseDatabaseFeatures.uses_custom_queryset, which regulates
+        whether this method is called at all.
+        """
+        return None
+
     def quote_name(self, name):
         """
         Returns a quoted version of the given table, index or column name. Does